All of the case are made of brass and high quality alloy, polished by hand carefully, and coated with ultra- hard and corrosion resistance plating,The finish is maintenance free and will never tarnish when exposed in marine envirometer for a long time.

*The color or luster is optional from which of polished brass,chrome and stainless steel.Waterproof: GL120.GL122,GL150,GL152,GL198 are semi-waterproof, can stand against splash water.warranty: Movement:2-year warranty lifetime servicingFinish of case:10-year warranty life servicingTechnical Specifications of Aneroid Barometer MovementBimetal Thermometer